we're joined by marcia coyle, the chief washington correspondent for the "national law journal," who at the court for today's oral arguments. thanks for coming in. >> my pleasure. >> yang: this case is carpenter vs. united states. >> timothy carpenter was arrested back in 2011 and convicted for a string of robberies of radio shacks and some other electronic stores in the detroit area. at trial, the government, the prosecution introduced what is called cell phone site location data that it had received from the -- from carpenter's cell phone companies and that data put him within half mile to two miles of the robberies that occurred in 2011. he argued that this violated his fourth amendment rights because the government got that data from the cell phone companies without a warrant. they did have an order to get it under separate federal law known as the stored communications act, but he said and argued to the supreme court today that the fourth amendment required a warrant to get the info. >> yang: under the other law, that's a different standard than a search warrant? >> a much lesse

that's according to marcia coyle, newshour regular and correspondent for the national law journal. shares a guide to watching the big cases this term, which is on our website, www.pbs.org/newshour. and tune in later tonight. on pbs, "frontline" presents part two of their documentary, "putin's revenge." with representatives from facebook, twitter and google on capitol hill this week, the timely film looks at what motivated vladimir putin to target american democracy through the 2016 election and how the u.s. struggled to confront the russian leader. "frontline" airs tonight on most pbs stations. and that's the newshour for tonight. on thursday, we'll speak to the texas republican congressman behind the tax overhaul. i'm hari sreenivasan. join us online, and again here tomorrow evening. for all of us at the pbs newshour, thank you and see you soon. >> major funding for the pbs newshour has been provided by: >> babbel. a language app that teaches real-life conversations in a new language, like spanish, french, german, italian, and more. babbel's 10-15 minute lessons are available as a